Seismic Network Operations

IU TRQA

Tornquist, Argentina

IU TRQA commences operations on: 2000,302

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Host: University of La Plata
Latitude: -38.057
Longitude: -61.979
Elevation: 540
Datalogger: Q330
Broadband: KS-54000
Accelerometer: FBA_ES-T_EpiSensor_Accelerometer
Telemetry Status at the NEIC: Last Data In Less Than 10 Minutes
Station Photo Station Photo Station Photo 

Vault Condition: Borehole

Site Geology: The borehole cuttings consisted of primarily gray siltstone with minor amounts of gray shale and gray sandstone.

Location CodeChannel CodeInstrumentFlagsSample RateDipAzimuthDepth
20LNZFBA ES-T EpiSensor AccelerometerCG1.00-90.000.0030.00
20HNZFBA ES-T EpiSensor AccelerometerTG100.00-90.000.0030.00
10VHZCMG3-TBCG0.10-90.000.0030.00
10LHZCMG3-TBCG1.00-90.000.0030.00
10BHZCMG3-TBCG40.00-90.000.0030.00
00VHZKS-54000CG0.10-90.000.00101.00
00LHZKS-54000CG1.00-90.000.00101.00
00BHZKS-54000CG20.00-90.000.00101.00
30LDOIU Paroscientific MicrobarographCW1.000.000.000.00
20LN2FBA ES-T EpiSensor AccelerometerCG1.000.0090.0030.00
20LN1FBA ES-T EpiSensor AccelerometerCG1.000.000.0030.00
20HN2FBA ES-T EpiSensor AccelerometerTG100.000.0090.0030.00
20HN1FBA ES-T EpiSensor AccelerometerTG100.000.000.0030.00
10VH2CMG3-TBCG0.100.00180.0030.00
10VH1CMG3-TBCG0.100.0090.0030.00
10LH2CMG3-TBCG1.000.00180.0030.00
10LH1CMG3-TBCG1.000.0090.0030.00
10HHZCMG3-TBTG100.000.000.0030.00
10HH2CMG3-TBTG100.000.00180.0030.00
10HH1CMG3-TBTG100.000.0090.0030.00
00VH2KS-54000CG0.100.00211.00101.00
10BH2CMG3-TBCG40.000.00180.0030.00
10BH1CMG3-TBCG40.000.0090.0030.00
00VH1KS-54000CG0.100.00121.00101.00
00LH2KS-54000CG1.000.00211.00101.00
00LH1KS-54000CG1.000.00121.00101.00
00BH2KS-54000CG20.000.00211.00101.00
00BH1KS-54000CG20.000.00121.00101.00
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Heliplot
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Availability, 2 Month
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As part of the annual calibration process, the USGS runs a sequence that includes a random, a step, and several sine wave calibrations.  The USGS analyzes the random binary calibration signal in order to estimate the instrument response.  The figures below show the results from the analysis of the most recent processed calibration at the station.

We use an iterative three-step method to estimate instrument response parameters (poles, zeros, sensitivity and gain) and their associated errors using random calibration signals. First, we solve a coarse non-linear inverse problem using a least squares grid search to yield a first approximation to the solution. This approach reduces the likelihood of poorly estimated parameters (a local-minimum solution) caused by noise in the calibration records and enhances algorithm convergence. Second, we iteratively solve a non-linear parameter estimation problem to obtain the least squares best-fit Laplace pole/zero/gain model. Third, by applying the central limit theorem we estimate the errors in this pole/zero model by solving the inverse problem at each frequency in a 2/3rds-octave band centered at each best-fit pole/zero frequency. This procedure yields error estimates of the 99% confidence interval.

LocChanCal DateEpoch-SpanGradeAmp Nominal Error (dB)Amp Best Fit Error (dB)Phase Nominal Error (degree)Phase Best Fit Error (degree)SensorCal Type
10BH12012:010 2012:010 to No Ending TiA0.0906290.0226860.52690.43029 CMG3-T-BRandom
10BH22012:010 2012:010 to No Ending TiA0.0880390.0225520.544350.43383 CMG3-T-BRandom
10BHZ2012:010 2012:010 to No Ending TiA0.00851540.00967140.0629990.084554 CMG3-T-BRandom
00BH12012:009 2011:038 to No Ending TiA0.0466490.0270070.942470.87982 54000Random
00BH22012:009 2011:038 to No Ending TiA0.0412290.026990.96330.9103 54000Random
00BHZ2012:009 2011:038 to No Ending TiA0.0517480.0260680.901130.83026 54000Random
  1. Current Issues.
    The site has been damaged by fire and has stopped transmitting. The microbarograph appears to have failed on 10 Oct 2009. The LN1 Episensor channel is noisy. The KS-54000 appears to have died on 2-8-2013. There is work being done on the regional power lines causing intermittent outages.
  2. 2009-05-22
    Upgraded to Q330 digitizer.